Implements staggered time step evolution

[jmartfrut]

Implements a function to evolve the staggered time step.

This allows for non-linear time stepping in the staggered solver. Also, relaxes the final tolerance check to avoid premature convergence.

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	8ec6e96...	main / 8ec6e96...
Constitutive models/Visco-elastic Ψ	0.0494 ± 0.027 ms	0.0496 ± 0.027 ms	0.996 ± 0.77
Constitutive models/Visco-elastic ∂Ψu	0.0646 ± 0.0067 ms	0.0647 ± 0.0058 ms	0.999 ± 0.14
Constitutive models/Visco-elastic ∂Ψuu	0.114 ± 0.015 ms	0.113 ± 0.014 ms	1 ± 0.18
Simulations/StaticMechanicalDirichlet	0.142 ± 0.0073 s	0.133 ± 0.0068 s	1.07 ± 0.077
Simulations/StaticMechanicalNeumann	0.131 ± 0.011 s	0.129 ± 0.013 s	1.01 ± 0.13
Simulations/ViscoElastic	20.7 s	20.8 s	0.999
Tensor algebra/Cofactor	0.061 ± 0.01 μs	0.07 ± 0.01 μs	0.871 ± 0.19
Tensor algebra/Det(A)Inv(A')	0.13 ± 0.01 μs	0.13 ± 0.001 μs	1 ± 0.077
Tensor algebra/δδ_λ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
Tensor algebra/δδ_μ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
time_to_load	2.43 ± 0.0048 s	2.42 ± 0.021 s	1 ± 0.0088

Memory benchmarks

	main	8ec6e96...	main / 8ec6e96...
Constitutive models/Visco-elastic Ψ	1.24 k allocs: 0.0777 MB	1.24 k allocs: 0.0777 MB	1
Constitutive models/Visco-elastic ∂Ψu	1.36 k allocs: 0.0898 MB	1.36 k allocs: 0.0898 MB	1
Constitutive models/Visco-elastic ∂Ψuu	2.32 k allocs: 0.155 MB	2.32 k allocs: 0.155 MB	1
Simulations/StaticMechanicalDirichlet	1.61 M allocs: 0.115 GB	1.51 M allocs: 0.109 GB	1.06
Simulations/StaticMechanicalNeumann	1.48 M allocs: 0.0933 GB	1.48 M allocs: 0.0933 GB	1
Simulations/ViscoElastic	0.343 G allocs: 22 GB	0.343 G allocs: 22 GB	1
Tensor algebra/Cofactor	1 allocs: 0.0781 kB	1 allocs: 0.0781 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 kB	1
Tensor algebra/δδ_λ_2d	0 allocs: 0 B	0 allocs: 0 B
Tensor algebra/δδ_μ_2d	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1